Inside-angle bead.



W. A. WIFIBECKER.A

INSIDE ANGLE BEAD. APPLICATION FILED r. zo, 1910.

Patented June 18, 1912.

T6155 SSE S @w d 557% WILLIAM A. WITTBECKER, 0F S'I. PAUL, MINNESOTA.

INSIDE-ANGLE BEAD.

To all whom t may concern:

Be it known that.I, WILLIAM A. WITT- BECKER, a citizen of the United States, and resident of St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Inside-Angle Beads, of which the following is a specification.

The invention relates to supports for plaster or other like coating or finish on walls and ceilings of rooms, and particularly. to such supports to situated at or approximate to inside angles or inner corners of such rooms; and its object is to provide an inside angle or -inner corner beadwhich will readily receive in solid forni and effectually lhold and retain plaster or other like coating or finish, intact and in place adjacent to said inside angles or inner corners notwithstanding distortion that may develop in the building from shrinkage, expansion, settling, or ot erwise, also to form a fixed and definite guide or plastering edge for the plasterer or other mechanic in applying the plaster or other coat-ing or finish; these ends being accomplished at comparatively slight cost of manufacture and slight additional cost for applying in-any construct-ion work; and to these ends the invention consists in the features of construction to be hereinafter more fully described and particularly pointed out in the claims.

In the accompanying drawings :-Figures l, 2 and 3 are cross sectional views of a p0rt-ion of three different building constructions l in which my invention is embodied as hereinafter more fully explained. Fig. 4 is a perspective view of the construction of angle bead shown in Fig. 1.'

In const-ructing the angle bead a strip of sheet. metal is rolled, stamped with a suitable 'die, or otherwise bent to form an intermediate longitudinal rentrant face a, preferably concave or substantially semi-circular in section, though its several advantages would be measurably realized by having it of rentrant angular section. Thel purpose ofthis rentrant construction is threefold, namely;

first to develop suiicient elasticity to cause yielding to take place in the face of the bead instead of in its walls adjacent to plaster, when the building structure becomes distorted by shrinkage, expansion or otherwise; second to leave the margins of the concave face standing out as fiduciary edgesy for use in gaging the plaster coat; third to relieve Specification of Letters Patent.

Application led April 20, 1910. Serial No. 556,631.

Patented June 18, i012.

the plainness of the corner, for esthetic reasons. From the extremities of this surface (l the metal is bent backward and outward at such angles that when placed in position, the walls thus formed are at an obtuse angle or something more than 900 to the plaster surface to be formed, and they therefore provide under-cut limiting walls against which the plaster may build up and by which the plaster may be keyed in position; said keying space however being without abrupt overhang and at such angle that the plaster readily flows into it and packs in solid mass under the spraying pressure applied pei'- pendicularly to the plaster-surface. At the innermost portions of these inwardly extending walls, the bead is provided with attaching flanges a5, a bent at such angles that they lic against the meeting walls when the bead is in place, and provided with perforations a7, to receive nails or other securing means a.

IVhen used in lath and plaster constructions (Fig. 1) the rearwardly extending poi'- tions comprise, in addition to the plaster, Walls al, a2 and attaching flanges a5, a the off-setting walls o3, a4 corresponding in width to the thickness of the lath, and adapted to stand perpendicular to the building. walls and receive and firmly hold the lath at the angle of the flange a, a. In constructions having brick on the one side and lath and plaster on the other, one only of the two members, a, a4 is provided with the offsetting wall a3 (see Fig. 2) while in brick constructions both these offsetting walls a3, a4 may be eliminated, (see Fig. 3).

When the angle bead is suitably secured in position to an inside angle to be supported and in coincident line therewith, should any opening, spreading, or expanding, or any compression thereafter take place in such inner corner construction, it will be coinmunicated to the concave or rentrant face '(a) of the bead, which by reason of its forin and the form of the shoulder supporting it, will yield and compensate for such opening, spreading, expanding or compression without drawing the walls a1, a2 away from the plaster, or exerting pressure against the plaster that would tend to buckle, check or crack the plaster. Again, when the invention has been firmly fastened tothe inside angle construction as above described and as illustrated by the accompanying drawings,

the margins a", al of the rentrant face of the bead aord firm, accurate and true edges or guides for use in applying the plaster or other coating; the bead being so constructed and fastened over the corner that the plaster or other coating when applied to the adjacent Wall and meeting edges a9, al leaves free of plaster or other coating the surface or face (a).

1. An inside continuous angle bead comprising attaching Hanges standing in relative position corresponding to that of the Walls forming the angle to be covered, plaster abutment- Walls standing apart and at acute angles to the respective attaching flanges and thereby providing undercut plaster keying spaces, and a concave rentrant Wall providing the corner face, joining the said'plaster abutment Walls; each of said attaching flanges and each of said plaster-abutment Walls being connected by an offsetting Wall; each of said plaster-abutment Walls being separated from said reentrant face by a guiding edge bywhich to determine the surface of the plaster coating.

2. An inside continuous angle beadcomprising attaching ianges standing in relative position corresponding to that of the Walls forming the angle to be covered, plaster abutment Walls standing apart and at acute angles to the respective attaching flanges and thereby providing undercut plaster keying spaces, and a concave reentrant face joining the said plaster abutment Walls, one of said attaching anges and one of said plaster-abutment Walls' being connected by an osetting Wall. 4

3. An inside continuous angle bead comprising attaching flanges standing in relative position corresponding to that of the Walls forming the angle to be'covered, plaster abutment-walls standing apart and atK acute angles to the respective attaching flanges and thereby providing undercut plaster keying spaces, and a concave rentrant face oining the said plaster abutment Walls, each of said attaching flanges and each of said plaster-abutment Walls being connected by an oil'setting Wall.

4. An inside continuous angle bead comprising attaching flanges standing in relative position corresponding tothat ofthe Walls forming the angle to be covered, plaster abutment Walls standing apart' and at acute angles to the respective attaching flanges and thereby providing undercut plaster keying spaces, and a concave rentrant face joining the said plaster abutment Walls, v

one of said attaching fianges and one of said plaster-abutment Walls being connected by an offsetting Wall, said plaster abut-ment walls and the rentrant face being separated by a guiding edge orn margin by which to determine the surface of the plaster coating.

WILLIAM A. WITTBECKER. Witnesses: i

ROSE L. Fono, B. E. MASON. 

